OK theres a small map bug on the city of Antioch , the two bridges are too close to the settlement , so if a friendly or neutral nations army passes by , it will get stuck , since the only way passing is to step one more step close to the city then next turn you get to pass (but AI doesn't know XD)
OR they could attack you (but since they are friendly and neutral LOL)
you get the idea ? i got like armies stuck outside my city of Anotich XD